scholarly journals Ferroelectric and Dielectric Properties of ZnFe2O4-Pb(ZrTi)O3Multiferroic Nanocomposites

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Shrabanee Sen ◽  
Sk. Md. Mursalin ◽  
M. Maharajan
Keyword(s):  
Lead Zirconate Titanate ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Hysteresis Loops ◽  
Lead Zirconate ◽  
X Ray Diffraction ◽  
Nanosized Powders ◽  
X Ray ◽  
Magnetoelectric Composites ◽  
Gel Technique

Magnetoelectric composites of zinc ferrite and soft lead zirconate titanate (PZT) having formula 0.5 ZnFe2O4-0.5 PZT were synthesized by sol-gel technique. X-ray diffraction analysis was carried out to confirm the coexistence of individual phase. TEM micrographs were taken to confirm the formation of nanosized powders and SEM micrographs were taken to study the morphology of the sintered pellets. Dielectric and P-E hysteresis loops were recorded, respectively, to confirm the ferroelectric properties of the composites.

EFFECT OF CeO2ON SINTERING TEMPERATURE AND PIEZOELECTRIC PROPERTIES PZT (Zr:Ti = 52:48) CERAMICS

2005 ◽  
Vol 19 (10) ◽  
pp. 1757-1769 ◽  
Author(s):  
P. SRIMAUNGSONG ◽  
N. UDOMKAN ◽  
L. PDUNGSAP ◽  
P. WINOTAI
Keyword(s):  
Lead Zirconate Titanate ◽  
Piezoelectric Properties ◽  
Ferroelectric Properties ◽  
Hysteresis Loops ◽  
Lead Zirconate ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Dopant Content ◽  
X Ray ◽  
Grain Distribution

The purpose of this research is to investigate the structure of lead zirconate titanate ceramics (Zr:Ti = 52:48) doped with CeO2and corresponding properties such as micro-structural properties, physical properties, dielectric constant (εr), piezoelectric properties (kp, Qm, and d33), and the ferroelectric property. The specimens were prepared via a conventional mixed oxide method and sintered at 1200°C. Rietveld refinement of X-ray diffraction patterns resulted in the P4mm tetragonal structure for all samples. At a high dopant content (10 mol%), pyrochlore phases of CeO2appeared which caused the detriment of dielectric and piezoelectric properties. At a low dopant content (1 mol%), Ce4+ions entered the B site with isovalent dopant effects, and clearly resulted lower values of εr, and kpcompared with those of the undoped sample. The hysteresis loops showed ferroelectric properties for all samples. Microstructures displayed dense grain distribution and thus yielded a high density. The additional phase of CeO2was clearly observed for 10 mol% doping which implied it was overdoped. Finally, the Curie temperature has been found to decrease with increasing dopant content, as determined from high temperature X-ray diffraction and differential scanning calorimetry.

Effects of Calcination Parameters on the Microstructure and Morphology of PZT Nanoparticles Prepared by Modified Sol–Gel Method

2012 ◽  
Vol 576 ◽  
pp. 326-329 ◽  
Author(s):  
Amid Shakeri ◽  
Hossein Abdizadeh ◽  
Mohammad Reza Golobostanfard
Keyword(s):  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Treatment Conditions ◽  
Perovskite Type ◽  
Perovskite Type Structure

Lead zirconate titanate nanopowder Pb(Zr0.53Ti0.47)O3 (PZT) was prepared by modified sol-gel method with 1-propanol as solvent and acetylacetone as stabilizer. The microstructure and particle size measurements at different heat treatment conditions were characterized by field emission scanning electron microscopy and x-ray diffraction analysis. It was found that the PZT nanoparticles calcinated at 600 °C showed mean diameter of 75-125 nm with high crystallinity of perovskite-type structure.

EFFECT OF PRE-HEATING TEMPERATURE ON THE CHARACTERISTICS OF PZT THIN FILMS GROWN BY USING A TRIOL SOL–GEL ROUTE

2007 ◽  
Vol 14 (02) ◽  
pp. 229-234
Author(s):  
SARAWUT THOUNTOM ◽  
MANOCH NAKSATA ◽  
KENNETH MACKENZIE ◽  
TAWEE TUNKASIRI
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Heating Temperature ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Hysteresis Loops ◽  
Lead Zirconate ◽  
Pzt Thin Films ◽  
Pzt Films ◽  
Ferroelectric Hysteresis

Lead zirconate titanate (PZT) films with compositions near the morphotropic phase boundary were fabricated on Pt (111)/ Ti / SiO 2/ Si (100) using the triol sol–gel method. The effect of the pre-heating temperature on the phase transformations, microstructures, electrical properties, and ferroelectric properties of the PZT thin films was investigated. Randomly oriented PZT thin films pre-heated at 400°C for 10 min and annealed at 600°C for 30 min showed well-defined ferroelectric hysteresis loops with a remnant polarization of 26.57 μC/cm2 and a coercive field of 115.42 kV/cm. The dielectric constant and dielectric loss of the PZT films were 621 and 0.0395, respectively. The microstructures of the thin films are dense, crack-free, and homogeneous with fine grains about 15–20 nm in size.

Structural, Morphological and Thermal Decomposition Studies of Calcium and Hafnium Modified BaTiO3 Electro Ceramics

2021 ◽  
Author(s):  
Jude Fernandez ◽  
B Bindhu ◽  
M. Prabu ◽  
KY Sandhya
Keyword(s):  
Lead Zirconate Titanate ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Ferroelectric Material ◽  
Tetragonal Symmetry ◽  
X Ray Diffraction ◽  
X Ray ◽  
Gel Combustion ◽  
Combustion Technique ◽  
P4mm Space Group

Abstract Calcium and hafnium co-doped barium titanate could be used as a replacement for lead zirconate titanate, which is a lead-based ferroelectric material. Solid state reaction accompanied by the usual sintering technique is the classical ceramic-processing method, which demands a lot of time and effort. The present work aims to make the process a lot easier and quicker by employing a modified sol-gel combustion technique to synthesize polycrystalline Ba0.85Ca0.15Ti(1-x)HfxO3 (x=0.00, 0.05, 0.10, 0.15) electro ceramics . The molar ration is fixed at 1:1 for metal and citric acid at pH ~ 1. It was found that Ba0.85Ca0.15Ti(1-x)HfxO3 (where x=0.00, 0.05, 0.10, 0.15) crystallizes completely at around 1000 °C which is much lower than traditional methods. The structure supposedly displays a tetragonal symmetry with the P4mm space group as confirmed through x-ray diffraction (XRD) and Raman spectroscopy.

Synthesis and Characterization of Nanocrystalline PZT Powders by a Simple Sol-Gel Method

2012 ◽  
Vol 512-515 ◽  
pp. 147-152
Author(s):  
Shao Peng Zhang ◽  
Xiao Hui Wang ◽  
Long Tu Li
Keyword(s):  
Grain Size ◽  
Lead Zirconate Titanate ◽  
Sintering Temperature ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
X Ray ◽  
Sol Gel Method ◽  
Average Grain Size

Nanocrystalline lead zirconate titanate (PZT) powders with composition at the morphotropic phase boundary (MPB) were synthesized by a simple aqueous based sol-gel method, using lead nitrate, zirconium nitrate and tetrabutyl titanate as the starting materials. The sol could be easily transformed into gel, firstly heated at 120°C for 10h, then at 180°C for 24h. The thermal decomposition process of the gel was investigated by thermogravimetric analysis (TGA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) techniques. The effect of citrate addition amount on the calcining temperature was discussed. The results reveal that pure perovskite phase PZT powders can be obtained at a calcining temperature as low as 600°C. The average grain size of the powders was determined by transmission electron microscope and X-ray diffraction. The influences of calcining temperature and the pH value of the solution on the grain size were investigated. The sintering temperature and electrical properties of the ceramics derived by nano-powders were compared with those prepared by the conventional ceramic processing. The result shows that using the nanopowder, the sintering temperature could be reduced by about 100°C and the ferroelectric properties were enhanced.

Preparation of PZT Material with Different Zi/Ti Ratio by Sol-Gel Method

2012 ◽  
Vol 238 ◽  
pp. 105-108 ◽  
Author(s):  
Xi Chen
Keyword(s):  
Lead Zirconate Titanate ◽  
Perovskite Phase ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Synthesis Temperature ◽  
X Ray Diffraction ◽  
Pure Perovskite Phase ◽  
Gel Technique ◽  
Relationship Of ◽  
The Relationship

Lead zirconate titanate powders (PZT) with different Zi/Ti values 52/48, 53/47, 54/46 and 55/45 were prepared by sol-gel technique. The sol was prepared by mixing stable solutions of Zr-nitrate, Pb-acetate and Ti (OC4H9)4 precursors. The decomposition of precursors above 773 K, 923 K and 1073 K for Zi/Ti value equls to 52/48; 53/47 and 54/46; 55/45 leads to the formation of pure perovskite phase, respectively. X-ray diffraction analysis was carried out to confirm the phase formation of PZT. The relationship of synthesis temperature and Zi/Ti ratio value is disscused and it is found that higher synthesis temperature is needed to prepare pure PZT with increasing Zi/Ti ratio.

Phase evolution studies of sol–gel derived lead zirconate titanate (PZT) nanopowder using X-ray diffraction and X-ray photoelectron spectroscopy

2011 ◽  
Vol 104 (1) ◽  
pp. 103-108 ◽  
Author(s):  
Anupama Sachdeva ◽  
Mahesh Kumar ◽  
Vandna Luthra ◽  
R. P. Tandon
Keyword(s):  
Lead Zirconate Titanate ◽  
Photoelectron Spectroscopy ◽  
Sol Gel ◽  
Phase Evolution ◽  
Lead Zirconate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Zirconate Titanate

DEVELOPMENT OF PEROVSKITE INPrSUBSTITUTEDPb(Zr0.52Ti0.48)O3AND DIELECTRIC CHARACTERISTIC

2006 ◽  
Vol 20 (21) ◽  
pp. 3071-3080 ◽  
Author(s):  
N. UDOMKAN ◽  
P. LIMSUWAN ◽  
P. WINOTAI ◽  
T. TUNKASIRI
Keyword(s):  
Lead Zirconate Titanate ◽  
Ferroelectric Property ◽  
Piezoelectric Properties ◽  
Pyrochlore Phase ◽  
Hysteresis Loops ◽  
Lead Zirconate ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Dopant Content ◽  
X Ray

The purpose of this research is to investigate the structure of lead zirconate titanate ceramics ( Zr:Ti =52:48) when doped with Pr2O3and the corresponding properties such as micro-structural properties, physical properties, dielectric constant (εr), piezoelectric properties (kp, Qm, and d33), and the ferroelectric property. The materials were prepared via conventional mixed oxide method and sintered at 1200°C. The Rietveld refinement of X-ray diffraction patterns and combination of both patterns revealed the tetragonal structure for all samples to have space group of P4mm. For higher dopant content (10 mol%), the pyrochlore phase of Pr2O3also appeared in the respective samples. These pyrochlore phases caused the detriment of dielectric and piezoelectric properties. For those with lower dopant content (1.00 mol%), the Pr ion substituted at the A and B sites with isovalent dopant effects, i.e. a lower value of εr, and kp. The hysteresis loops indicated the ferroelectric property for all samples. The microstructure showed dense grain according to a high density and the additional phases of Pr2O3were clearly observed for 10 mol% doping. The Curie temperature decreased with increasing dopant content, as determined from high temperature X-ray diffraction and differential scanning calorimetry.

Synthesis and studies of local of ferroelectric properties of lead zirconate titanate thin films obtained by sol-gel technique

2013 ◽  
Vol 4 (5) ◽  
pp. 400-404 ◽  
Author(s):  
D. A. Kiselev ◽  
M. V. Silibin ◽  
A. A. Dronov ◽  
S. A. Gavrilov ◽  
V. M. Roshchin ◽  
...  
Keyword(s):  
Thin Films ◽  
Lead Zirconate Titanate ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Lead Zirconate ◽  
Zirconate Titanate ◽  
Gel Technique

An Investigation of Solvent Effect on Rhombohedral/Monoclinic/Tetragonal Phase Properties of Pb(Zr0.53Ti0.47)O3 Nanoparticles Prepared via Sol-Gel Method

2013 ◽  
Vol 829 ◽  
pp. 698-702 ◽  
Author(s):  
Amid Shakeri ◽  
Hossein Abdizadeh ◽  
Mohammad Reza Golobostanfard
Keyword(s):  
Acetic Acid ◽  
Lead Zirconate Titanate ◽  
Monoclinic Phase ◽  
Volume Fraction ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Domain Size ◽  
X Ray Diffraction ◽  
Pure Perovskite Structure ◽  
X Ray

The highest piezoelectric and ferroelectric properties of lead zirconate titanate (PZT) occur in vicinity of morphotropic phase boundary (MPB). In MPB, crystalline phase ratios play a crucial role in determining the dielectric properties. In this paper, PZT nanoparticles were synthesized by a modified sol gel procedure and the effects of different solvents of methanol, ethanol, 1-propanol, and acetic acid on tetragonal, rhombohedral, and monoclinic phase ratios near the Pb (Zr0.53Ti0.47)O3 were investigated. The X-ray diffraction results show the formation of almost pure perovskite structure in all samples. The volume fraction of tetragonal and rhombohedral phases, lattice constants, and lattice distortion were measured from the X-ray diffraction and Raman spectroscopic analysis for each solvent. Also, the domain size was compared between the solvents. A trace amount of monoclinic phase could be detected by Raman spectroscopy. The results show that acetic acid is the most appropriate solvent for synthesizing of PZT nanoparticles in which the tetragonal lattice parameters are ct=4.16 Ǻ and at=4.02 Ǻ with a distortion of 3%. The tetragonal volume fraction is estimated about 77%. The particle size and degree of agglomeration were measured according to field emission electron microscopy and indicates that 70 nm particles were formed for acid-based sample.

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